<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
	<title>demo5</title>
	<link rel="stylesheet" href="./css1.css" type="text/css">
	<style type="text/css">
		h2{
			color:blue;
		}
	</style>

</head>
<body>
	<h1 style="color:red">内联样式</h1>
	<h2>内部样式</h2>
	<h3>引入样式</h3>
	<p>导入样式</p>
</body>
</html>